Lighting Unit and Display Equipment Provided Therewith
AssigneeHitachi Displays, Ltd.
InventorsMasaya Adachi, Tatsuya Sugita
Life of this patent
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Abstract
A light-guiding member is provided with two light source groups on its both terminals and the light-guiding board comprises two light mixing areas which have a cross section form which is symmetry for its center line, and a light outputting area between these. The light mixing areas function as an area in which the lights from each adjacent light source group are mixed and at the same time function as an area to output the mixed lights from each remote light source group. The light outputting area functions as an area to pass a part of the mixed lights from the two light source groups and at the same time functions as an area to output the rest.
Claims17
A lighting unit comprising a light-guiding member, and, a first light source group and a second light source group in which a plurality of light emitting devices arranged adjacent to each of two terminal surfaces facing each other in said light-guiding member are aligned in a line or in a belt, wherein:
- said light-guiding member comprises a first light mixing area adjacent to the first light source group, a second light mixing area adjacent to the second light source group, and a light outputting area between the first light mixing area and the second light mixing area;
- in said first light mixing area and said second light mixing area, lights which enter from the plurality of light emitting devices configuring an adjacent light source group are mixed with each other, and lights which enter from a remote light source group and are mixed with each other are outputted;
- and
- in said light outputting area, a part of the lights mixed with each other are transmitted and the rest of the lights are outputted.
A lighting unit comprising a light-guiding member, and, a first light source group and a second light source group in which a plurality of light emitting devices arranged adjacent to each of two terminal surfaces facing each other in said light-guiding member are aligned, wherein:
- said light-guiding member comprises two tapered shape areas in which their thickness get thicker from their terminal surfaces towards their central directions, and between these tapered shape areas a flat plane area continuous to these areas.
Display equipment comprising a display panel which displays an image by adjusting the transmitted light intensity of light and a lighting unit which illuminates said display panel from the rear, wherein:
- said lighting unit comprises a light-guiding member, and, a first light source group and a second light source group in which a plurality of light emitting devices arranged adjacent to each of two terminal surfaces facing each other in said light-guiding member are aligned;
- said light-guiding member comprises a first light mixing area adjacent to the first light source group, a second light mixing area adjacent to the second light source group, and a light outputting area between the first light mixing area and the second light mixing area;
- in said first light mixing area and said second light mixing area, lights which enter from the plurality of light emitting devices configuring an adjacent light source group are mixed with each other, and lights which enter from a remote light source group and are mixed with each other are outputted;
- in said light outputting area, a part of the lights mixed with each other are transmitted and the rest of the lights are outputted;
- and
- the long side direction of the display area of said display panel and the arrangement direction (longitudinal direction) of the plurality of light emitting devices are matched.
Dependencies are inferred from the claim text.